John q



.l. BIRKEY.

Gas Stove.

Patented Nov. 5, 1867.

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TO ALL-WHOM'IT MAY CONCERN Be it known that I, JOHN Q. BIRKEY, ofPhiladelphia, Pennsylvania, have invented an Improvement in Gas-Stoves;and I do hereby declare the following to be a full, clear, and exactdescription of the same.

My invention consists of an improvement, fully described hereafter, inthe gas-stove for which-Letters Patent were granted to me on October 31,1865, my present improvement being such as to concentrate the flameabove the wire gauze, and to increase the heat of the flame.

In order to enable others skilled in the art to make and use myinvention, I will now proceed to describe its construction andoperation, reference being bad to the accompanying drawing, which formsa part of this specification, and in which-- Figure 1 is a verticalsection of my improved gas-stove.

Figure 2, an inverted plan view, and

Figure 3, a sectional plan on the line 1-2, fig. 1. e

A is a metal casing, the form of which maybe varied without departingfrom the main features of my invention. In the present instance it issquare, viewed transversely, and has a slight'taper from thebaseupwards, the upper end terminating in the horizontal portion a, inwhich is an opening for receiving the tube B, a rib on the latterfitting into a recess formed in thc'edge of the said opening. Withinthis tube is a hollow inverted cone, D, terminating at the lower end ina flaring mouth, d, which, however, is not essential to the propercarrying out of my invention. The upper end of this hollow inverted coneis furnished with any suitable number of projections, e, which fit inrecesses in the upper edge of the tube 13, the projections and recessesbeing such that the cone is maintained at a short distance fromthe-tube, an. annular space, f, intervening between the two. On the topof the cone and tube rests a disk, of wire gauze, or a perforated metalplate, E,

which is confined at the edges by a plate, F, secured .to the top of thecasing A, the said plate also serving to confine the tube B to itsplace, and-having projections, h, for receiving a culinary utensil. Theinner edgc of the plate adjacent to the upper end of the tube B isinclined outward, as shown in fig. 1, for a purpose described hereafter.Through the casing A passes a pipe, I, for conveying ordinaryilluminating gas to a tip, j, which is situated below but centrally withthe hollow inverted conc D. In the sides of the casing are openings, or,of any desired form for admitting a plentiful supply of air.

The above-described.gas-stove. is very similar to that for which LettersPatent were granted to me on October 31, 1865, with the exception-of thetube B, which is the main feature of my present improvement. I

have found that by arranging this tube in the manner described inrespect to the hollow cone, extending the wire gauze E across both, andpermitting a plentiful supply of air to pass in the direction of thearrow through the space between the tube and cone and through the gauze,the flame above the latter is more concentrated and the heat of theflame more intense than when the tube is absent. I have found that thewithin-described arrangement of the plate F, with its inclined inneredge, in respect to the perforated, plate E, tends to spread the flame.

' I claim as my invention, and desire to secure by Letters Patent- Thetube B,'arifanged in respect to the hollow cone D and wire gauze orperforated disk E, substantially as and for the-purpose setjforth.

2. The plate F, with its inclined inner edge arranged in respect to theperforated plate or wire-gauze disk E, substantially as and for thepurpose described.

'In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN Q. BIRKEY.

Witnesses:

'CnARLEs E. Fosrnn,

W. J. R. DELANY.

